Hypothermia is defined as a core temperature of less than 35 degrees C. Hypothermia changes homeostasis of human body. It includes neurologic, cardiovascular, and metabolic abnormalities. we have anesthetized a woman patient who had intracranial hemorrhage with accidental hypothermia of 27.8 degrees C. We managed for elevation of body temperature with elevation of room temperature (30 degrees C), bladder irrigation with warm saline, application of warming pad and infusion of warming fluid during 4 hours and 20 minutes. At the end of anesthesia, her body temperature was 34.3 degrees C.